Chemical tempering in porcelains is done to interrupt crack propagation by______________?

Related Mcqs:

Porcelain denture teeth________________?

A. Have a higher coefficient of thermal expansion than acrylic teeth: B. Have a lower abrasion resistance than enamel C. Should be used where the inter dental clearance is small D. Have a higher abrasion resistance than gold...

In method of firing: A shorter firing period at a higher temperature is considered better_______________?

A. A large time period at a lower temperature is preferred B. A long firing period at a very high temperature is preferred C. A short firing period at a very low temperature is preferred D. none of these...

Ceramics fired to metals are processed by_______________?

A. Heat pressing B. Machining C. Sintering D. Slip casting...

Coefficient of thermal expansion of metal-ceramic alloys is________________?

A. Same as porcelain B. More than porcelain C. Less than porcelain D. More than or equal to porcelain but not less...

The main purpose of adding metallic oxides in ceramic is________________?

A. Colour matching B. Transparency C. Opacity D. None of the above...